\begin{tabular}{|r||r@{}l|r|r@{ / }r|}\hline\hline
\mc{6}{|c|}{Average Cost of Treatment}\\\hline\hline
Population & \mc{2}{c|}{Estimand} & p-value & \mc{2}{c|}{90\% Confi.}\\\hline
\mc{1}{|l||}{ Full } &           0.061 & $^{**}$ &            0.02 &           0.012 &           0.138 \\
\mc{1}{|l||}{ Treated } &          -0.239 & $^{***}$ &            0.00 &          -0.380 &          -0.206 \\
\mc{1}{|l||}{ Untreated } &           0.360 & $^{***}$ &            0.00 &           0.336 &           0.530 \\
\hline\hline
